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Old 01-07-2008, 01:36 AM   #1 (permalink)
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Join Date: Jan 2008
Location: NoVA
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Spin - '03 Mazda Miata SE
90 day: 26.55 mpg (US)
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How Low Can You(r Battery) Go?

Originally Posted by MetroMPG View Post
That said, running a vehicle off its battery alone is a pretty extreme mod. Yes it will save fuel. It will also destroy a regular starting battery in short order, since they're not designed to be deeply & repeatedly dis/charged.

This is a mod I often use in summer months. But I've got a supply of old deep cycle batteries which I can ruin at will.
This has come up a couple times, and looks like it might pop over here soon too.

However, I don't remember seeing hard numbers/curves on cycle life vs. depth of discharge for starter batteries (oem, gel-cel, etc.).

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